All the students wanted to know what the teacher meant ______saying that.A.as B.for C.to D.by 说理由
问题描述：
All the students wanted to know what the teacher meant ______saying that.A.as B.for C.to D.by 说理由
答
D by 通过 by doing sth 通过做某事
句意是：所以学生都想知道老师那样说是什么意思.